265206634342387 has 2 divisors, whose sum is σ = 265206634342388. Its totient is φ = 265206634342386.

The previous prime is 265206634342369. The next prime is 265206634342423. The reversal of 265206634342387 is 783243436602562.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 265206634342387 - 2²⁷ = 265206500124659 is a prime.

It is not a weakly prime, because it can be changed into another prime (265206634342087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132603317171193 + 132603317171194.

It is an arithmetic number, because the mean of its divisors is an integer number (132603317171194).

Almost surely, 2^{265206634342387} is an apocalyptic number.

265206634342387 is a deficient number, since it is larger than the sum of its proper divisors (1).

265206634342387 is an equidigital number, since it uses as much as digits as its factorization.

265206634342387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209018880, while the sum is 61.

The spelling of 265206634342387 in words is "two hundred sixty-five trillion, two hundred six billion, six hundred thirty-four million, three hundred forty-two thousand, three hundred eighty-seven".